VB 6.0 calls ActiveX DLL written in C# : GUID ???

Question

Hallo, after days of hard work I managed to write a very simple C# DLL that I was able to register as COM object. Now I am able to use this ActiveX from my old VB 6 Code. But now I need the GUID that is used for this component to identify because there is an old VB 6 projects that includes arbitary DLLs with a certain method requirement by reading the GUID out of a INI file. I want to write this GUID of my own C# DLL to this INI file but I have no idea how I can get it... Anybody here for helping me? Thanks a lot!